UK source for screw for front roof fastener assembly?
 

The driver's side roof fastener has become loose on my S2000, and I've just noticed that one of the two black screws securing the latch to the front corner of the roof is missing. Does anyone know where I can find a replacement for this screw in the UK? Alternatively, does anyone know what the spec is so that I can look for it on eBay or a specialist site?

That screw is the same size as the screw used to fasten your rotors to the hubs. The difference is that it's not black. One of mine fell out and that's what I used.

They are M6x12mm or 16mm long countersunk screws, you should be able to find new ones at most well sorted hardware stores.

Many thanks for the info - I've ordered an M6x16mm from eBay.
By the way, excuse my ignorance but what/where are the rotors/hubs??

Brake rotors. They are fastened to the wheel hubs with a small screw.